N=0, please help me solve this problem step by step

Problem 1 Judy lives for two-periods. Her utility from consumption in periods 1 and 2 is given by U(CI,C2)=Ci(10-Nylicz(N+1). She has income my and my in periods 1 and 2 respectively and no initial wealth. The interest rate is r. There is no inflation. a) Find Judy's optimal choice of consumption in period 1 and 2 expressed in present value. b) What is Judy's consumption in each period if my = (260, my = f1 10 and r = 0.1? Is Judy saving or borrowing? c) Suppose the interest rate increases to r' = 0.2. What would be Judy's consumption in each period? Does she borrow/save more or less than before? Is she now worse off or better off than before